GE WAN ports on ISR 900 Series

[sasha]

Hello. Which speeds are supported on GE WAN ports of ISR 900 Series, e.g. C921-4P? Can these WAN ports connect to a 10/100 Mbps device? Thanks and best regards.

[Georg Pauwen · Accepted solution]

Hello,

the WAN ports support auto/100/1000, the LAN ports support 10/100/1000...

That means a 10Mbps device is not supported on the WAN port.

[Joseph W. Doherty]

From what Georg notes, the WAN port should connect with a 10/100 device because it should work at 100 with such a device. (Surprising, though, it doesn't support 10 Mbps, as I would expect that might still be offered as a physical Ethernet WAN hand off speed.)

Also, even though ports can physically run at gig, I suspect the 900 doesn't have sustained (routed) gig throughput capacity. (Device's throughput, other than for IPSec, I couldn't find documented.)